class websocketUtil {
	constructor(url, time, userID) {
		this.is_open_socket = false //避免重复连接
		this.url = url //地址
		this.data = null
        this.userID = userID
		//心跳检测
		this.timeout= time //多少秒执行检测
		this.heartbeatInterval= null //检测服务器端是否还活着
		this.reconnectTimeOut= null //重连之后多久再次重连
        this.enable = true;
        this.callbackList = [];
		try {
			return this.connectSocketInit()
		} catch (e) {
			console.log('catch');
			this.is_open_socket = false
			this.reconnect();
		}
	}

	// 进入这个页面的时候创建websocket连接【整个页面随时使用】
	connectSocketInit() {
		this.socketTask = uni.connectSocket({
			url: this.url,
			success:()=>{
				console.log("正准备建立websocket中...",this.url);
				// 返回实例
				return this.socketTask
			},
		});
		this.socketTask.onOpen((res) => {
			console.log("WebSocket连接正常！");
			clearTimeout(this.reconnectTimeOut)
			clearTimeout(this.heartbeatInterval)
			this.is_open_socket = true;
			// this.start();
			// 注：只有连接正常打开中 ，才能正常收到消息
			this.socketTask.onMessage((res) => {
				console.log(res.data)
                let wsObj = JSON.parse(res.data);
                for (var id in this.callbackList) {
                    this.callbackList[id](wsObj);
                }
			});
		})
		// 监听连接失败，这里代码我注释掉的原因是因为如果服务器关闭后，和下面的onclose方法一起发起重连操作，这样会导致重复连接
		// uni.onSocketError((res) => {
		// 	console.log('WebSocket连接打开失败，请检查！');
		// 	this.is_open_socket = false;
		// 	this.reconnect();
		// });
		// 这里仅是事件监听【如果socket关闭了会执行】
		this.socketTask.onClose(() => {
			console.log("已经被关闭了")
			this.is_open_socket = false;
			this.reconnect();
		})
	}
    
    addOnMsg(str, callback) {
        if (typeof callback == 'function') {
            this.callbackList[str] = callback
        }
    }
    
	close(){
        this.socketTask.close();
        this.enable = false;
    }
    
	//发送消息
	send(value){
		// 注：只有连接正常打开中 ，才能正常成功发送消息
		this.socketTask.send({
			data: value,
			async success() {
				console.log("消息发送成功");
			},
		});
	}
	//开启心跳检测
	start(){
		this.heartbeatInterval = setInterval(()=>{
			this.data={
                    from: this.userID+'MiniApp',
                    to: this.userID + 'H5',
                    type: 'heartbeat',//'heartbeat', chatRoom
                    room: {
                        roomId: '',
                        ownerId: '',
                    },
                    message:"心跳",
                }
			// console.log(this.data)
			this.send(JSON.stringify(this.data));
		},this.timeout)
	}
	//重新连接
	reconnect(){
		//停止发送心跳
		clearInterval(this.heartbeatInterval)
		//如果不是人为关闭的话，进行重连
		if(!this.is_open_socket&&this.enable){
			this.reconnectTimeOut = setTimeout(()=>{
				this.connectSocketInit();
			},3000)
		}
	}
}

module.exports = websocketUtil
